like Malloc, Realloc and especially Free conflict with already existing names
on some operating systems or other packages.  That is reason enough to change
the names of the OpenSSL memory allocation macros to something that has a
better chance of being unique, like prepending them with OPENSSL_.

This change includes all the name changes needed throughout all C files.

algorithm is used.

temporary BIGNUMs. BN_CTX still uses a fixed number of BIGNUMs, but
the BN_CTX implementation could now easily be changed.

word-based algorithm we are using?)

Clean up bn_mont.c.

now change it to BN_RECURSION_MONT so it isn't compiled in.

descriptions as pointed out by Dave Carman <carman@erols.com>